JPH11136714A - Electronic exchange system and multi-line service control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend a multi-appearance service provided only to digital multi- function telephone sets to conventional communication terminals such as standard telephone sets and PHS terminals. SOLUTION: A standard telephone set 33 and a PHS terminal 32 are coordinate-controlled with personal computers 34, 35 by a digital exchange 10 respectively. In this case, A GUI control menu including function buttons equivalent to a digital multi-function telephone set is displayed on the personal computers 34, 35 coordinate-controlled under the control of a computer program executed therein. A line state as to each telephone number assigned to the corresponding standard telephone set 33 or PHS terminal 32 is displayed on the GUI control menu and call control is executed to the corresponding standard telephone set 33 or PHS terminal 32 according to operations on the menu.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic exchange system and a multi-line service control method, and more particularly to a multi-line function for sharing one telephone number with a plurality of telephones or assigning a plurality of telephone numbers to one telephone. And a multi-line service control method used in the electronic switching system.

[0002]

2. Description of the Related Art Conventionally, some digital private branch exchanges have a multi-line function in which one telephone number is shared by a plurality of telephones, or a plurality of telephone numbers are assigned to one telephone. The service using the multi-line function is called a multi-appearance service or the like, and is conventionally applied only to a digital multi-function telephone. FIG. 6 shows an example of a usage form of the multi-appearance service.

FIG. 6 shows an example in which three extension telephone numbers "5000", "5001", and "5002" are commonly assigned to three digital multifunction telephones (A, B, and C). It is shown. On each digital multifunction telephone, three extension telephone numbers "5000",
For each of “5001” and “5002”, a function button with an LED indicating a call state (busy, incoming, idle) is arranged. These digital multifunction telephones (A,
B and C) are controlled by the corresponding terminal control modules (A, B and C). Each of the terminal control modules (A, B, C) has the extension telephone number "500
0, "5001" and "5002", respectively, so that three digital multi-function telephones (A,
B, C), an incoming call process is performed simultaneously.

[0004] For example, when an incoming call is made with the extension telephone number "5000", the function buttons with the corresponding LEDs of the three digital multi-function telephones (A, B, C) are turned on and off by the LEDs. Extension phone number "5
000 ”. In this state, when any of the digital multi-function telephones goes off-hook, the digital multi-function telephone and the calling side are connected to the line, and the corresponding LED display of the line-connected digital multi-function telephone indicates that a call is in progress. Change, and for each of the remaining digital multifunction phones, the corresponding LED changes to a display indicating a busy state.

[0005] In this way, by identifying and displaying the call status of each of a plurality of telephone numbers assigned in common, the user of each digital multi-function telephone sets an empty number among the plurality of telephone numbers. It can be used to make and receive calls efficiently.

[0006]

However, in the conventional digital private branch exchange, a multi-appearance service in which one telephone number is shared by a plurality of telephones or a plurality of telephone numbers are assigned to one telephone is a digital multi-function. This service is provided only to telephones.
A similar service could not be provided to a standard telephone, a PHS telephone, etc. using only one line. This means that a digital multifunction telephone can identify and display the call status by a function key on the telephone, but a standard telephone or a PHS telephone does not have such a function for identifying the call. Because.

The present invention has been made in view of the above circumstances, and is provided only for a digital multifunctional telephone in which one telephone number is shared by a plurality of telephones or a plurality of telephone numbers are assigned to one telephone. Exchange system and a multi-line service control method capable of providing a general service such as a standard telephone and a PHS telephone to ordinary communication terminals such as a standard telephone and a PHS telephone so that the standard telephone and the PHS telephone can realize functions equivalent to a digital multifunctional telephone. The purpose is to provide.

[0008]

SUMMARY OF THE INVENTION The present invention has a multi-line function for sharing one telephone number with a plurality of telephones or assigning a plurality of telephone numbers to one telephone.
In an electronic exchange system for providing a multi-line service using the multi-line function to a digital multi-function telephone, a communication interface for communicating with a computer network, and other than the digital multi-function telephone housed in the electronic exchange system Means for managing each of the communication terminals to provide the multi-line service and computers on the computer network in association with each other, and controlling the communication terminals and the computers corresponding to each other in an interlocking manner, Interlocking control means for displaying the line status of each telephone number assigned to the communication terminal on a computer screen corresponding to the communication terminal, and providing a multi-line service equivalent to a digital multifunction telephone to each communication terminal. Must be configured to provide The features.

In this electronic exchange system, a predetermined computer on a computer network is associated with a normal communication terminal such as a standard telephone or a PHS terminal to which only one line is conventionally allocated and used. Have been. The correspondence between the communication terminal and the computer is performed for each individual in the office, for example, and a personal computer placed on a desk of each individual and a standard telephone are controlled in conjunction with each other. In this case, an operation screen equivalent to, for example, a digital multifunction telephone is displayed on the screen of the personal computer, and on the operation screen, under the control of the electronic exchange system, each of the telephone numbers assigned to the corresponding communication terminal is displayed. The line status is displayed. As a result, even when using an ordinary standard telephone or PHS terminal having no function button with an LED or the like, the call status of each line can be identified and displayed on the screen of the corresponding computer. A service can be provided in which one telephone number is shared by a plurality of telephones, or a plurality of telephone numbers are assigned to one telephone.

[0010] Further, as an operation screen displayed on a personal computer, a screen for a multi-line service including function buttons equivalent to a digital multifunction telephone is displayed using a computer program or the like. It is preferable to process a communication message from a computer following the screen operation described above as a communication message from a communication terminal corresponding to the computer. As a result, it is possible to use the digital multifunctional telephone in the same operation method as the digital multifunctional telephone by operating the digital multifunctional telephone on the linked personal computer.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of an electronic exchange system according to an embodiment of the present invention. Here, a private branch exchange system will be described as an example, and its configuration will be described.

As shown in the figure, the digital exchange 10
Extension circuit 20, base station interface 21, standard telephone interface 22, LAN interface 2
3, a trunk circuit 24, an exchange unit 26, a main control unit 27, and a storage unit 28.

The extension circuit 20 accommodates a plurality of digital multi-function telephones 30 on the extension side, and under the control of the main control unit 27, transmits and receives call signals to and from each of the digital multi-function telephones 30. It performs interface operations for call control such as giving and receiving.

The base station interface 21 accommodates a plurality of PHS private radio base stations 31 on the extension side, and there is a call to the base station 31 from an office line or from an extension. In this case, a down control signal indicating an incoming call is sent to the base station 31, and an outgoing control signal to that effect is sent to the main control unit 27 when there is a call request from the base station 31. Each base station 31 forms a wireless area and wirelessly communicates with a PHS terminal 32 in that area. In the present embodiment, the private branch exchange system is premised, so that the PHS terminal and the PHS radio base station are for private use only. Here, for access to a radio line set between the base station 31 and the PHS terminal 32, four-channel multiplex multi-carrier TDMA
(Time Division Multiple Access)-TDD (Time D
ivision Duplex) method is used. In a TDMA frame transmitted / received using this 4-channel multiplex multi-carrier TDMA-TDD system, four slots for transmission and four slots for reception are time-division multiplexed, and one slot for transmission and a corresponding reception slot are used. And one slot constitutes one wireless channel.

The standard telephone interface 23 accommodates a plurality of standard telephones 33 on the extension side.
Under the control of the main control unit 27, an interface operation for call control such as transmission and reception of an outgoing / incoming call signal with each of the standard telephones 33 is performed.

The LAN interface 23 controls a number of personal computers (PCs) under the control of the main controller 27.
-A, PC-B, PC-C) 34, 35, 36,... Have an input / output interface function with the LAN 11 to which the LAN interface 23 is connected.
Is used for interlocking control between the standard telephone 33 or the PHS terminal 32 and a personal computer to realize a multi-appearance service. In the example of FIG. 1, a personal computer (PC-A) 34 used by a user of the standard telephone 33 is used for the standard telephone 33.
However, for the PHS terminal 32, the PHS terminal 32
Personal computer (PC)
-B) 35 are associated with each other, and the linked terminal and computer are controlled in association with each other.

The trunk circuit 24 is connected to the public network 37 via a local line, and detects a call signal from the local line under the control of the main control unit 27. Has functions.

The switching unit 26 includes an extension circuit 20, a base station interface 21, a standard telephone interface 22,
LAN interface 23 and trunk circuit 24
Each of them is connected via a communication path 25 composed of a PCM highway or the like, and under the control of the main control unit 27, the public network 37 and the digital multifunction telephone 30 on the extension side,
A call between the standard telephone 33 and the PHS terminal 32,
It performs call exchange between extensions and connection exchange for enabling data exchange between a computer on the LAN 11 and the public network 37 or the extension.

The main control unit 27 controls the operation of the entire digital exchange 10, and, via the data highway 100, an extension circuit 20, a base station interface 21, a standard telephone interface 22, a LAN interface 23, a trunk Circuit 24 and exchange unit 2
6 are controlled in accordance with a program stored in the storage device 28. This main control unit 27
Is provided with a function for multi-appearance service control using interlocking with a personal computer in addition to a normal exchange control function. These functions are stored in the storage device 2
8 is realized by the program stored in the memory 8.

As described above, the multi-appearance service is a service in which one telephone number is shared by a plurality of telephones or a plurality of telephone numbers are assigned to one telephone and used. However, in this embodiment, the standard telephone 33 and the P
The HS terminal 32 is also provided with a multi-appearance service equivalent to a digital multifunction telephone. In this case, a graphical user interface (GUI) operation screen including function buttons equivalent to a digital multifunction telephone is displayed on the personal computer that is controlled in conjunction with the computer program executed there. On this GUI operation screen, the corresponding standard telephone 3
3 or the telephone number assigned to the PHS terminal 32 is displayed, and the call control of the corresponding standard telephone 33 or PHS terminal 32 is performed according to the operation on the operation screen.

When performing such a multi-appearance service, the above-mentioned LAN interface 23
It is used for controlling communication between the standard telephone 33 and the personal computers 34 and 35 which are controlled in conjunction with the PHS terminal 32, respectively, and the contents of operations on the GUI screen transmitted from the personal computers 34 and 35 via the LAN 11 Is transmitted to the main control unit 27, and under the control of the main control unit 27, the line status (busy, incoming, idle, etc.) of each telephone number assigned to the standard telephone 33 and the PHS terminal 32 is transmitted to the LAN 11. To transmit the data to the corresponding personal computers 34 and 35 via the.

The contents of the communication message exchanged between the main control unit 27 and the programs on the personal computers 34 and 35 via the LAN interface 23 are transmitted to the main control unit 27 via the extension circuit 20 and the digital multi-functions. This is the same as a communication message exchanged with the telephone 30.

FIG. 2 is a block diagram showing a functional configuration of the main control unit 27. The main control unit 27 includes a call control unit 200 for realizing a multi-appearance service function and a PC connection information management unit 201 for performing interlocking control with a computer. Each of the call control unit 200 and the PC connection information management unit 201 is realized by software.

The call control unit 200 includes a line control function for controlling a call for each telephone number and managing a line state (busy, incoming, idle, etc.), the extension circuit 20, the base station interface 21, Standard telephone interface 22,
It has a terminal control function for communicating with a corresponding extension communication terminal or computer by controlling the LAN interface 23. The line control function and the terminal control function are respectively realized by a line control module and software realized by software. It is implemented as a terminal control module.

The storage device 28 stores a table showing the correspondence between each extension number and the communication terminal to which it is assigned. For example, extension phone number "5000",
“5001” and “5002” are respectively assigned to the digital multifunction telephone 30, the standard telephone 33, and the PHS terminal 33.
Are shared by the three communication terminals, the digital multifunction telephone 30 and the standard telephone 33 are stored in the communication terminal columns of the tables corresponding to the extension telephone numbers "5000", "5001", and "5002". , And the PHS terminal 32 are registered.

The PC connection information management unit 201 manages the correspondence between communication terminals other than the digital multi-function telephone 30 and which are subject to the multi-appearance service, and personal computers to be controlled in conjunction therewith. A PC connection information table indicating the correspondence between the communication terminals and the personal computer is also stored in the storage unit 28 as shown.

In the case of the example shown in FIG. 1, a personal computer (PC-A) 34 is registered in the PC connection information table as a personal computer to be controlled in conjunction with the standard telephone 33, and as a personal computer corresponding to the PHS terminal 32, Personal computer (PC-B)
35 will be registered in the PC connection information table.

The contents of each table managed by the call control unit 200 and the PC connection information management unit 201 are as follows:
The registration and rewriting can be performed from a control terminal or the like connected to the digital exchange 10.

FIG. 3 shows the principle of multi-appearance service control in this embodiment. Here, 3 communication terminals (A, B, C)
Extension numbers "5000", "5001", "50"
It is assumed that “02” is commonly assigned. 1
The first communication terminal (A) is a digital multi-function telephone 30, the second communication terminal (B) is a standard telephone 33 controlled in conjunction with a personal computer (PC-A) 34, and the third communication terminal The terminal (C) is a PHS terminal 32 that is controlled in conjunction with a personal computer (PC-B) 35.

On the digital multi-function telephone, function buttons with LEDs indicating the line use status (busy, incoming, idle) for each of the three extension telephone numbers "5000", "5001", and "5002" are provided. Are located.
Similar function buttons are provided for the personal computer (PC-A) 34 and the personal computer (PC-A).
-B) It is also displayed on each GUI screen. G
FIG. 4 shows an example of the UI screen.

As shown in FIG. 4, three extension telephone numbers “5000” and “500” are displayed on the GUI screen.
Function buttons equivalent to a digital multi-function telephone, including function buttons with LEDs corresponding to "1" and "5002", are all displayed as icons. By clicking these icons with a mouse, the same communication message as when the digital multi-function telephone 30 is operated is sent to the main control unit 27 of the digital exchange 10.

The control of the three communication terminals (A, B, C) shown in FIG. 3 is performed via the corresponding interface units (extension circuit 20, base station interface 21, standard telephone interface 22, LAN interface 23). This is performed by exchanging communication messages with the communication terminals (A, B, C). The control of the interface unit for exchanging communication messages with each of the three communication terminals (A, B, C) is performed by the terminal control modules (A, B, C). Here, the terminal control module B includes a terminal control module b1 for controlling the standard telephone 33 and a personal computer (PC-PC).
A) A terminal control module b2 for controlling 34, and a terminal control module C
It comprises a terminal control module c1 for controlling the terminal 32 and a terminal control module c2 for controlling the personal computer (PC-B) 35.

Each of the terminal control modules (A, B, C) has an extension telephone number “5000”, “5001”, “50”.
02 "as shown in the figure, the three line control modules respectively correspond to the three line control modules, so that the incoming call processing is simultaneously performed to three communication terminals (A, B, C) with the same extension number.

For example, when an incoming call is made with the extension telephone number "5000", the line control module corresponding to the extension telephone number "5000" sends the terminal control module (A,
B, C), an incoming call instruction is issued. This allows
Regarding the digital multifunctional telephone 30, the incoming call is notified by ringing and the LED of the function button with the LED corresponding to the extension telephone number "5000" blinking green. As for the communication terminal (B), the ringing of the standard telephone 33 and the G of the personal computer (PC-A) 34
LE of function button with corresponding LED on UI
The incoming call is notified by D flashing green. Similarly, for the communication terminal (C), the PHS terminal 3
4 and the personal computer (PC-B) 35
The incoming call is notified by the LED of the function button with the corresponding LED on the GUI blinking green.

In this state, if one of the communication terminals responds by off-hook operation (for the communication terminals B and C, not only the off-hook operation of the standard telephone 33 and the PHS terminal 32 but also the off-hook operation by clicking the off-hook button on the GUI screen) ) Is notified to the line control module corresponding to the extension telephone number "5000" via the corresponding line control module, whereby the communication terminal that has responded first and the calling side are line-connected. Thereafter, the line control module corresponding to the extension telephone number "5000" again issues an instruction indicating the line state to each of the terminal control modules (A, B, C), and for the communication terminal connected to the line, the telephone or GUI is used. The display of the LED corresponding to the extension number "5000" on the screen changes to a display indicating that the call is in progress (lit green), and the remaining communication terminals correspond to the extension number "5000" on the telephone or the GUI screen. Each of the LEDs to be changed to a display indicating a busy state (lit red).

In this way, by identifying and displaying the state of each of a plurality of lines allocated in common, each communication terminal can be made to correspond to a plurality of calls. Not only the user but also the user of the standard telephone 33 and the PHS terminal 32 can efficiently make and receive calls using the vacant line among the three lines.

Next, a processing procedure for multi-appearance service control in this embodiment will be described with reference to FIG. Here, a personal computer (PC-
A) 34 and personal computer (PC-B) 3
Standard telephone 33 and PHS terminal 3 controlled in conjunction with
2 will be described.

The call control unit 200 provides a multi-line service regardless of whether the connected communication terminal is the digital multi-function telephone 30, the PHS terminal 32, or the standard telephone 33. That is, the communication terminals are uniformly treated as targets of the multi-line service regardless of the type of the communication terminals.

When an outgoing call request is made from a certain telephone to an extension number “5000” commonly assigned to the standard telephone 33 and the PHS terminal 32, the call control unit 200
First, the interface corresponding to the destination communication terminal is checked by referring to the correspondence table between the extension number and the communication terminal, and for each of the interfaces (here, the standard telephone interface 22 and the base station interface 21), Then, a communication message for making an incoming call to the destination communication terminal is sequentially sent using the corresponding terminal control module.

At this time, the call control unit 200 sends a personal message to the destination communication terminal to which the communication message is to be transmitted, based on the registered contents of the PC connection information management table managed by the PC connection information management unit 201. It is checked whether or not the computer is associated, and if there is an associated personal computer, the same communication message as that of the destination communication terminal is sent to the personal computer. In this example, a personal computer (P
When the communication message for the incoming call is sent to the standard telephone interface 22, the same communication message is sent to the personal computer (PC) via the LAN interface 23 because the C.A.
-A) also sent to 34. Similarly, since the personal computer (PC-B) 35 is associated with the PHS terminal 32 which is the destination communication terminal, when sending the incoming communication message to the base station interface 21, the same communication message is used. Is also sent to the LAN interface 23.

As described above, the pair of the standard telephone set 33 and the personal computer (PC-A) 34
S terminal 32 and personal computer (PC-B)
An incoming call is made to each of the 35 pairs.

When the standard telephone 33 goes off-hook, a communication message indicating the off-hook is sent to the call control unit 200 via the standard telephone interface 22 as a response to the incoming call.
Sent to In addition, personal computers (PC-
A) When an off-hook operation is performed on the 34 GUI screen, a communication message indicating the off-hook operation is sent to the call control unit 200 via the LAN interface 23, and the communication message is transmitted to the PC registered in the PC connection information table. According to the connection information, the personal computer (PC-A) 3
4 is processed as an incoming call response from the standard telephone 33, which is a communication terminal corresponding to No. 4. Thereby, the standard telephone 33,
And GU of personal computer (PC-A) 34
Whichever of the I screens is used, it is possible to respond to an incoming call.

Upon receiving an incoming call response from the standard telephone set 33 or the personal computer (PC-A) 34, the call control unit 200 sends a message indicating acceptance of the response to the standard telephone set 33 via the standard telephone interface 22. At this time, the same message is transmitted to the personal computer (PC-A) 34 associated with the standard telephone set 33 via the LAN interface 23 by referring to the PC connection information table. Thereby, the personal computer (PC-A)
The display of the LED corresponding to the extension number “5000” on the GUI screen of 34 changes to green light indicating the call state. In addition, the call control unit 200 sends a status notification message for notifying the current line status of the extension number “5000” to another communication terminal to which the extension number “5000” is allocated, that is, the PHS terminal 32. . This status notification message is also sent to the personal computer (PC-B) 35 via the LAN interface 23. Thus, the LED corresponding to the extension number “5000” on the GUI screen of the personal computer (PC-B) 35
Changes to a red light indicating a busy state.

Then, the call control section 200 connects the originating telephone and the standard telephone 33 with a line, and sets a call state. Thus, when there is a personal computer associated with the communication terminal by the PC connection information,
By transmitting the same communication message as the communication message to the communication terminal to the personal computer, the digital multifunction telephone on the GUI screen of the personal computer is controlled, and the digital multifunction telephone on the GUI screen of the personal computer is controlled. The message input from the telephone is processed as a communication message from a communication terminal corresponding to the personal computer.

In this way, by controlling the standard telephone 33 and the PHS terminal 32 in conjunction with the personal computer, it is possible to provide the standard telephone 33 and the PHS terminal 32 with a multi-appearance service similar to that of a digital multifunctional telephone. It becomes possible.

In the present embodiment, an example has been shown in which the multi-appearance service is provided only to the standard telephone set 33 and the PHS terminal 32 by the interlocking control with the personal computer. It is also possible to provide a multi-appearance service to a communication terminal connected to an office line or a dedicated line by controlling interlocking with a personal computer.

[0047]

As described above, according to the present invention,
By assigning multi-line lines to standard telephones and PHS telephones and controlling the personal computer in conjunction with each telephone, the GUI on the personal computer
It is possible to provide them with a multi-line service by operation from a digital multi-function telephone. Also,
In the interlocking control, the same message as a communication message to be transmitted to a communication terminal such as a standard telephone or a PHS telephone is transmitted to a personal computer corresponding to the communication terminal, and a communication message from each personal computer is transmitted to the personal computer. Since it is processed as a communication message from the corresponding communication terminal,
Using a GUI operation screen equivalent to a digital multifunction telephone displayed on a screen of a personal computer, a function equivalent to a digital multifunction telephone can be provided to each communication terminal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an electronic exchange system according to an embodiment of the present invention.

FIG. 2 is an exemplary block diagram showing a functional configuration of a main control unit of the digital exchange used in the electronic exchange system according to the embodiment;

FIG. 3 is a view for explaining the principle of a multi-line service whose operation is controlled by the main control unit of FIG. 2;

FIG. 4 is an exemplary view showing an example of a GUI operation screen used in the embodiment.

FIG. 5 is an exemplary view showing a processing procedure of multi-line service control in the embodiment.

FIG. 6 is a view for explaining the principle of normal multi-line service control for a digital multi-function telephone.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Digital exchange 20 ... Extension circuit 21 ... Base station interface 22 ... Standard telephone interface 23 ... LAN interface 24 ... Trunk circuit 25 ... Communication path 26 ... Exchange part 27 ... Main control part 28 ... Storage part 30 ... Digital multifunctional telephone 31 ... Base station 32 ... PHS terminal 33 ... Standard telephone 34,35,36 ... Personal computer (PC-
A, PC-B, PC-C) 37 public network 100 data highway 200 call control unit 201 PC connection information management unit

Claims (6)

[Claims] A telephone number shared by a plurality of telephones;
Or an electronic exchange system having a multi-line function for assigning a plurality of telephone numbers to one telephone and providing a multi-line service using the multi-line function to a digital multi-function telephone, A communication interface for performing communication between the communication terminal to provide the multi-line service and a computer on the computer network among communication terminals other than the digital multifunction telephone housed in the electronic exchange system. Means for managing, and interlocking control means for interlocking control of a communication terminal and a computer corresponding to each other, and displaying the line status of an individual telephone number assigned to each communication terminal on a screen of a computer corresponding to the communication terminal. For each communication terminal. Electronic exchange system, characterized in that it is configured to provide a barrel enhanced phone corresponds multiline service. 2. A screen for a multi-line service including a function button corresponding to the digital multi-function telephone is displayed on the computer, and the interlocking control means controls the computer from the computer according to a screen operation of the computer. 2. The electronic exchange system according to claim 1, wherein the communication message is processed as a communication message from a communication terminal corresponding to the computer. 3. The electronic exchange system according to claim 1, wherein the communication terminal to provide the multi-line service is a standard telephone or a PHS terminal. 4. One telephone number is shared by a plurality of telephones,
Or an electronic exchange system having a multi-line function for assigning a plurality of telephone numbers to one telephone and providing a multi-line service using the multi-line function to a digital multi-function telephone, A communication interface for performing communication between the communication terminal to provide the multi-line service and a computer on the computer network among communication terminals other than the digital multifunction telephone housed in the electronic exchange system. Means for managing, transmitting the same message as the communication message to be transmitted to each communication terminal to the computer corresponding to the communication terminal, and transmitting the communication message from each computer to the communication message from the communication terminal corresponding to the computer. When By means of a corresponding communication terminal and means for interlocking the computers with each other, and using an operation screen including a function button equivalent to a digital multi-function phone displayed on the computer screen to handle the computer. An electronic exchange system, which provides a multi-line service equivalent to a digital multifunctional telephone to a communication terminal that performs the operation. 5. One telephone number is shared by a plurality of telephones,
Or, a multi-line used in an electronic exchange system having a multi-line function for assigning a plurality of telephone numbers to one telephone and providing a multi-line service using the multi-line function to a digital multi-function telephone A service control method, wherein a communication terminal to provide the multi-line service among communication terminals other than the digital multifunction telephone accommodated in the electronic exchange system and a computer on a computer network are managed in association with each other. The communication terminal and the computer corresponding to each other are interlocked and controlled, and the line status of each telephone number assigned to each communication terminal is displayed on the computer corresponding to the communication terminal on a screen. Multi-function equivalent to a digital multifunction telephone for communication terminals Multi-line service control method being characterized in that to be able to provide in-service. 6. A telephone number shared by a plurality of telephones,
Or, a multi-line used in an electronic exchange system having a multi-line function for assigning a plurality of telephone numbers to one telephone and providing a multi-line service using the multi-line function to a digital multi-function telephone A service control method, wherein a communication terminal to provide the multi-line service among communication terminals other than the digital multifunction telephone accommodated in the electronic exchange system and a computer on a computer network are managed in association with each other. Then, the same message as the communication message to be transmitted to each communication terminal is transmitted to the computer corresponding to the communication terminal, and the communication message from each computer is processed as a communication message from the communication terminal corresponding to the computer. By responding A communication terminal and a computer are controlled in conjunction with each other, and an operation screen including a function button equivalent to a digital multi-function phone displayed on the computer screen is used. A multi-line service control method characterized in that a multi-line service control method is provided.